If there are only two Parcels of land left to be probated, one being w survivorship deed, and the other in a trust do ineed probate attorney??

My mother passed away in January. Anything she had monetarily liquid was in a trust for me. Other than that there is a property with a survivorship deed with her name and my name on it. And a parcel of land owned by either a family business that we own or in a trust. Trying to get that paperwork figured out exactly. If that's all there is left do I need an attorney for probate or am I better off to go through it by myself? I put a retainer on an attorney however he's telling me it's going to take months or longer to go through probate because the estate. But there's nothing left. She had spent everything. I feel as though he just wants to explain me for money. Is this a possibility? And if I open the probate myself and I need a lawyer later can I do that then??